Hi gchermennov,

The error messages reported indicate a disconnection of the communication with the server detected by the client library.
The most common cause for this type of error is a network problem, maybe a temporary network failure, could this be your case?
Otherwise you should make sure that is not the server, for some reason, deliberately terminating the connection, but in this case you need to analyze the Lightstreamer server logs.

Regards,
Giuseppe